ColoS

I found a way to stop Yoog from reappearing after being removed from the search engine list. Go to Control Panel/Folder Options/View scroll down the list until you see "Use simple file sharing" and disable it, hit Apply and Ok.Then go to X:\Documents and Settings\XXXXXX\Application Data\Mozilla\Firefox\Profiles\xxxxx.default to the mentioned in the other posts searchplugins folder and delete yoog.hml file. Go back and right click the searchplugins folder, select Sharing and Security. Select the Security tab and on the bottom of the box named Permissions for Administrators check the deny box in front of "Write" , repeat the same for all Groups or user names after selecting them in the top box, apply the settings and hit ok. When you start Firefox Yoog search is gone :) The bad side of this is that if you want to get a new search engine you'll have to uncheck the deny on "Write" because with it on nobody on the computer can create new files in the searchplugins folder and then enable it again to stop Yoog from appearing (because actually the files that create Yoog.hml are still there, but with this option on they don't have access to create it in this folder). I'm using Windows Xp SP3 so this process will probably be different in Vista and other operating systems, but I think that the principle is the same.